Audible.com’s features provide support for receiving paid content using the same process for subscribing to the free podcasts which have recently become very popular. Although his article uses the very nice iPodder application to demonstrate the features, there’s no reason why you can’t use the built-in podcasting features of iTunes 4.9, and skip the extra application.

Here are instructions and a couple of screenshots, which you can splice into Phillip’s article where he’s working with iPodder.